Portable scale



L. A. OSGOOD PORTABLE SCALE May 3 1927. 6 1,626,961

Filed March 1 1 2 Sheets-Sheet 1 um/whoa LM ,OL, 6

3513 at-iiozmm p,

' 1,626,961 May 1927' l... A. OSGOOD PORTABLE SCALE Filed March 1 1920 2Sheets-Sheet 2 wi t Patented May 3, 1927.

UNITED STATES 1,626,961 PATENT OFFICE.

LOUIS ASHLEY OSGOOD, OF DAYTON, OHIO, ASSIGNOE, BY MESNE ASSIGNMENTS, TOINTERNATIONAL SCALE COMPANY, OF DAYTON, OHIO, A CORPORATION OF ILLINOIS.

PORTABLE SCALE.

Application filed March 16, 1920.

This invention relates to improvements in the scale shown and describedin my c0pcnd- .ing application Serial No. 105,903, filed June 26, 1.916.

In scales of this type known as portable dial scales, one of thetroublesome features has been that the scales change their balance whenmoved about upon an uneven surface, for example, upon a factory floor.

()ne of the objects of the present invention resides in the dispositionof the parts and in particular the counter-balaneing pendulums, in sucha manner that changes in balance are minimized it not entirely obviatedwhen the scale is moved upon an uneven sup porting surface.

Other objects of the present invention reside in the provision of anovel tare poise setting device which is adapted to indicate the amountof tare upon a visible dial and in which the tare poise is set byturning a tare knob. The construction of the tare device is such thatall parts are Within the casing of the scale with the exception of thetare knob. The casing protects the parts against tampering or injury.

Other objects of the invention reside in the provision of: a device inwhich the tare setting may be made in a more accurate manner thanheretofore and in which the tare weight may be readily read.

Other objects and advantages will be pointed out in the accompanyingspecification and shown in the drawings, in which:

Fig. 1 shows a sectional view of the scale, the section being taken online 1--1 of Fig. 2.

Fig. 2 shows a. front view with the cover plate over the tare devicesremoved.

Fig. 3 shows a front view of the complete scale with the cover plate inplace.

Fig. 4- shows a detail central section taken on line 1- -1 Of Fig. 1.

Fig. 7) is a diagrammatic view showing the action of the pendulums when.the scale tilted.

The scale housing includes a base or plat form housing 10, a pedestal11, and a dial housing 12. Within the base is a suitable base leversystem for supporting the platform 13. The pedestal housing 11 isenlarged as shown at 14:, to provide space for the main scale beam 15,which is provided with knife edges 16 resting in bearings carried by abracket best shown in Fig. I.

Serial No. 366,223.

ancing means, I preferably branch the weight moved member or nose iron21 as shown at 22 and 23 in Figs. 1 and 2. Branch 23 carries knife edges24-. A short connect-' ing element or steel-yard 26 carries a lower trigloop that co-operatcs with these knife edges and at its upper endconnects with. a trig loop 25 supported by knife edges 27. These knifeedges are carried by an evener bar 28.

Disposed horizontally across the pedestal 11 and supported tliiereby arefour plates or bearing sup 'iorting members 29, 30, 31. and 32. Thesemembers carry V-bearings 83 (see Figs. 2 and 4). The bearing lines of:all these hearings align and this bearing line also coincides with thecenter line of the short steel-yard or connecting element 26 (see Fig.2).

Fearful um corral er?)aZ/mcc.-A double pendulum arrangement is used. forcounterbah ancing. The pendulum balls or weights are shown at 34; and85.

The pendulum ball-carrying arms are shown at 36 and 37. This arm 36 isbifurcated at 38 into two arms 39 which are spaced. apart so as to clearthe short steelyard 26 and the trig loop 25 and evener bar 28. The arms39 are forked to a greater extent at 40 so as to pass outside of thebearing supporting members and 3'. arm 39 is provided. with a hub l-l.carrying a knife edge 4-2 which rests in the hearing can ried by hearingsupporting n'iciubers 29 and 32 (see Figs. 1, 2 and 4-). Beyond the hubs4L1, arms 39 are united by a member 43 which is provided with an arm 44in vertical align ment with the evener bar 28.

The arm 37 which carries pendulum ball similarly bifurcated as shown at45 to clear the steel-yard -26, trig loop 25, and evener bar 28 andthese bifurcated arms 46 are provided with iubs 47 carrying knife edges48 which rest in the bearings supported by members 30 and 31. The arms46 are similarly joined beyond the hubs by a par -15) which has anoutwardly extending arm in alignment with arm at and with evcner bar 28.

The aligned arms -l-l and so which will hereafter be termed crank armsare provided with pairs of kni'te edges 51 and 52. Links and 5ico'operate with these kni'te edges and with similar pairs of knife edges55 and 56 carried by the evener bar 28.

The arrangement described provides a means for maintaining the samecounterbalancing action and the same zero balance when the scale istipped slightly. Fig. 5 shows the act on that takes place when the scaleis tipped. it will he observed that the distances oi the pendulum balls(as-shown by solid lines) from the steel-yard 26 is the same as thedistance of the balls from dotted line XI I., which is the true verticalline when the scale is tipped. litter the balls are in the displaced(dotted line) position they will move upwardly through equal arcs uponthe application ot a load to the platform. The arcs are the same as thearcs traversei'l by the balls with the scale lever.

Tore Doiriccs.FiXed in tare beam 18 is a hollow stud The center line ofthe stud is in alignment with knife edge pivot 16 as shown in Fig. 2.lVithin the stud is a shatt 58 which has atits inner end a pinion 59meshing with a rack 60. Rack 60 is tastened to a tare poise 61 whichpoise is slidable upon the tare beam in the usual manner. bhatt 58projects through an opening in a pedestal cover plate (32 and through asimilar opening in a dial glass 63 and carries at its end a knob G lwhich will hereafter be termed a tare knob. Cover plate 62 has linedthereto a graduated dial 63 and shaft 58 has pinned thereto a member (55carrying a pointer 60 adapted to sweep over the dial. The operation willbe read ly iniderstood. The tare weight is compensated for by turningthe tare knob and sliding poise (it to the right on the tare beam. Whenthe scale comes to balance as shown by the main weight indicator (57,the operator reads the tare weight indicated by the po nter 66 ongraduated dial (33. The dial eonstruc tion provides a greater space torgraduations than the tare beam itself would provide and the settingofthe poise can be made more accurate and in less time than could be doneby a hand setting of the poise.

Furthermore. the tare devices are all euclosed and are not subject totampering or injury. It will be understood that suitable clearanceshould be provided around the shaft at the points where this shat'tpasses the cover plate and glass. These features are well known to thoseskilled in the art and need not be set forth in further detail here in.

The pendulum mounting herein described has other advantages over:t'ormer construetions in which the peudulumu are mouutciil high up inthe dial housing or pedestal. in the present construction the pcudulumsare mounted low down in the 'l'rame ot the scale and are therefore lesssubjectto the ettects ot changes ol level than with pr or constructionshaving the pendulum mounting disposed at a considerable distance iron:the floor.

\Vhile the improved pendulummounting is particularly :ulvantagcous withportahle scales, it. is also advantageous with. station ary scales whichin some cases are mounted upon weak floors. \Vith these installationz-iditliculty has been experienced with changes in balance when heavytrucks are moved in the vicinity of the scales. The present constructionprevents changes in balance under these conditions.

What I claim as my invention is particularly set forth in the appointedclaims.

I claim 1. In a scale having aweight moved element and a pendulumcoimtcrbalancing means adapted to he variably displaced thereby inaccordance with varying loads on the scale, in combination a pluralityof counterlnilaneing pendnluins, an aligned pivot niounti r; for allsaid penduluins. oppositely extending crank arms adapted to actuate saidpenduhnns, an cvcuer bar disposed below said crank arms, means connect--ing said crank arms and said evener bar and connections between saidcvener bar and said weight moved member.

2. In a scale having a weight moved element and a pendulumcountel-balancing means adapted to be variably displaced thereby inaccordance with varying loads on the scale in combination. a pluralityof counterbalancing penduluins, a plurality of carrying arms for saidpeuduiunis, said arms heiirc bitur ated. an aligned pivot mounting forsaid penduluuis, members connecting said carrying arms and havingoppositely extending crank arms for actuating the pendulums, knife edgescarried by said crank arms, an evener bar disposed below the crank armscarrying knitt'e edges, links connecting the knife edges of the evencrbar to the knife edges of the crank arm and opcrating connections fromsaid evener bar to said weightmoved element.

3. In a scale in combination. a pair of counterlmlaneing pendulums. analigned pivot mounting therefor; means for supporting saidPtlltlltlllll'lS upon said aligned pivots, oppositely extendinp crankarms associated with said means and adapted to swing thependuluins inopposite d rections, an evener bar disposed below said arms. means forconnecting said evener bar with said crank arms, and a connection toamoving part of the scale from said evener ban Ill" said connectionbeing in vertical alignment with the line ol' the pivots which supportthe pendulum.

4;. In a scale in combination, a weight moved part, a plurality oi:pairs of bearing supporting members, aligned bearings carried thereby, apendulum counterbalance su iported by one pair of said bearings andhaving biiturcated pendulum ball carrying arms and a crank arm. a secondpendulum counterbalai'ice carried by the other pair of said bearings andhaving bifurcated arms adapted to clear said first mentioned arms and acrank arm oppositely disposed to said first mentioned arms a nd, meansfor operating It pendulums in. unison and conlpei'lsatin tor chai'igcsin scale level, said means ci'm'iprising a connection to the weightmoved part. an evener bar connected to said connection, and meansconnecting the ends of the evcner bar with said crank arms. a

5. In a scale in combination, a plurality ot bearing supporting members,a plurality of aligned bearings carried thereby, a plurality oi pendulumcounterbalancing n'ieans sumaorted by said boa rings, crank arms foractuating said pendulums extending, oppositely from, said bearing line,depending links connected to said crank arms, an evener bar connected tosaid links, and a depending connection from said evener bar to a weightmoved part, the aforesaid pendulum counterbalaneing means includingbifurcated pendulum weight carrying arms adapted to clear each other andthe evener bar and associated parts.

(3. A weighing scale incliuling in combination, a base, an. upperindicator housing, an interll'iediate housing below the indicatorrousing, a lever within the base, an automatic counterbalancing systemcomprising a double pendulum structure opin'atively connected to thelever and to each other to cooperate for out of level condititms ot thescale, said system being disposed substantially in the lower part of thelower intermediate housing to ailord. minimum dis placen'ient ot thesame upon out of level displacement of the scale said double pendulumsboth having a common and coincident pivotal axis. and operatingconnections to the indicating devices in said indicator housi ng. 'T..In a scale in comlnnation, a main scale beam, an autonniticcounterb'alance thereafter adapted to cause said beam to assume varyingpositions of displacement in accord a uce with varying loads thereon, atare beam connected to the main beam, at poise slidablc thereon, a rackcarried by said poise, a pinion meshing with said rack, means includinga rotatable shaft for rotating the pinion and shifting the position ofthe tare poise, and a graduated dial and a pointer carried by said shaftadapted to indicate the displacement of the poise and the amount of thetare.

8. In a scale in combination, a housing, a main scale beam. tulcrumedtherein, an automatic counterbalance therefor, said beam as sumingvariable positions in accordance with the variable loading thereof, atare beam carried by said s ale beam and within the housing, a tarepoise slidable upon said beam, a rack carried by said poise, a pinionmeshing therewith, and means for displacing the position of the poisefrom without the housing, said means including a rotatable shaft adaptedto rotate the aforesaid pinion.

9. In a scale in cinnbination, a housing, a main scale beam tulcrumedtherein, a tare beam carried by said scale beam and within said housing,a tare poise slidable upon said are beam, a rack carried by said poise,a pinion meshing therewith, and means for rotatingthe pinion anddisplacing the poise from without the housing, said means including arotatable shatt having its axis concentric with the fulcrum line of themain scale beam and adapted to rotate the aforesaid pinion.

lO. In a scale in combination, a tlulcrumed scale beam structure. a tarebeam associated therewith, a poise slidable thereon, a rack connected tosaid poise, a pinion meshing with said rack, means including a rotatableshatt having its axis concentric with the fulcrum line for rotating thepinion and for shifting the position of the tare poise, and a graduateddial and a pointer operatively connected to said shaft adapted toindicate the displacement of the poise and the amount of the tare.

ill. In a scale having a si'lppinting struc ture, a weight moved elementand dpendte lum connterlmlancing means adapted to be variably displacedthereby in accordance with arying loads on the scale, in combination, aplurality ot colinterbalancing penduluins. means for connj ensating thependulum action upon variations in level of the said. supportingstructure, said means comprising an aligned knife edge pivot mountingfor all said pendulinns, means including oppositely and outwardlyextending arm portions for actuating the said pendulums, an evenerdevice disposed below sairil last mentioned means, means connecting saidevener device and pendulum actuating means, and. Ol'JGl'ittlDQjCOlHlQCtlOIlS between said evener device and said weight moved element,

12. A weighing scale including an indica tor housing, an indicatordriving device therein, a scale beam below said housing, a housing belowsaid beam, a base lever, an automatic pendulum system within the housingbelow the scale beam, said system including a pair of pendulumsoperatively connected to each other to afford compensation for changesin level of the scale and dis posed relatively low in said housing toafford minimum displacement of the same 5 upon out of level conditionsof the scale, and

operating connections connecting the pendulum system, the lever, thescale beam and indicator drix'ing device to effect conjoint operationupon the applicntion of a load to the lever. 10

In testimony whereof I hereunto nflix my signature.

LOUIS ASHLEY OSGOOD.

